Social mobile location startup Rummble has added the ability for members to ‘check-in’ and recommend places via Twitter, rather than having to use the company’s Android or iPhone app or browser-based version. It does this through a bit of nifty but fairly crude sentiment analysis, turning any tweet with the hashtag #rummble into something the service will understand. So, for example “Hanging out in Joes Cafe, 9th Ave, NYC. Great coffee and free wifi. 7/10 #rummble” would be interpreted as a check-in to Joes Cafe, giving it a Rummble of 7/10 noting the “great coffee and free wifi
